Rivet furnaces

Furnace-type air heaters are manufactured from cast iron or steel, and cased in brickwork or steel. The cast-iron heaters are sectional, cemented and bolted together. The steel type are welded or riveted. It is essential that the joints are airtight, so that the cold air can pass over the heated surfaces of the furnace and flues without contamination by the flue gases. 

Nuts, bolts, rivets, screws Hot iron, torch, furnace, vacuum... 

Charge carriers for high-temperature furnaces (W). Other fiimace components are rivets, pins, washers, spacers, and annealing boats (W). 

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